Maximum-pressure safety inflating tire-gage.



s. P. NOE. y MAXIMUM PRESSURE SAFETY INFLATING TIRE GAGE.

APPLICATION FILE-D MAY 28, 1914.

Patented Apr. 27, 1915.

2 SHEFTS-SHEET 1- S. P. NOE. MAXIMUM PRESSURE SAFETY INFLATING TIREGAGE.

APPLICATION FILED MAI/28.1914.

l 9 l 37,52 l D. Patented Apr. 27, 1915.

2 SHEETS-SHEET 2.

WT/VESSES l/Vl/E/V TOR www SEAMA'N PARTERSUS NOE, OF OCEAN-GROVE, NEVVJERSEY.

MAXIMUM-PRESSURE SAFETY INFLAT'I'NG Trai-:lenen Specification of LettersPatent. llllvatnttiliipr, 27, igl,

Application filed May 28, 1914. Serial No. 841,531.

To @ZZ tlf/0m it may concern.

Be it known that I, SEAMAN P; Non, a citizen of the United States,'and aresident of @cean Grovefin the county of Monmouth and State of NewJersey, have invented a new and `improved MaXimum- Pressure Safetylniiating Tire-Gage, of which the following is a full, clear, and exactdescription.

This invention has special reference to the iniiation of pneumatic tiresor other bodies adapted to receive air under pressure and means forindicating the pressure of the air within such tires or bodies, and' forthis purpose l provide anv improved maximum pressure safety iniatingtire gage.

The primary object ofthe invention is to provide a device of. thecharacter named which will prove a certain and positive means forinsuring the exact pressure in an inner tube of a pneumatic tire .or thelike that such tire is designed'to carry, and to automatically indicateat.. all times the pressure within the tire and especially the manimumpressure which the tire is adapted to withstand.

Another object of the invention is to provide a gage of the classdescribed which can be attached to any inner tube, inserted through thefelly of the wheel and inflated through in the same manner as thepresent valve, and which remains on the inner tube until replacement ofthe tube is desired, in which case the gage is removed and applied tothe new or repaired inner tube which replaces the one damaged orotherwise worn out.

A still further object of the invention is to provide an improvedmaximum pressure safety inliating tire gage which, due to'its size andconstruction will appear like or simulate an ordinary iiiflating valvefrom -the exterior and which, due to a novel at' of a tire in theordinary'way'an'd in which nal pressure which may, for instance, resultfrom slight expansion of the lair in the inner tube or' bodycontaining-air under'ipressure. 1 Among other objects, it is 'also'an-object of'tliis invention tolprovide an improved gage having' a capof'novelconstruction so that' the entrance of water or'ini'sture'intcthe working parts of the Valve is 'obviated, and thus not only aretheworking parts protected from injury 'or deterioration but their positiveoperation as well as prolonged useful life is insured.

lVith the above'and 'other objects in view, the invention resides in thepeculiar combination and arrangement of par'tsto' be hereinafter morefully described, illustrated'and claimed, it being also an object toprovide a device which is simple in construction, durable and efficient.

Reference is'to be had to the accompanyi ing drawings forming a part ofthis specififragmentary portions of a tire and felly, the

tire being equipped with the improved maXimum pressure safety intlatingtire gage and in position to enter an aperture of Vthefelly in theassemblage of the parts composing an automobile wheel; Fig. 2 is anenlarged longitudinal sectional view of the improved tire gage and itssecuring parts attached to a wheel, a fragmentary portion 'of which isalso shown in section; Fig. 3' is a perspective view of a fragmentaryportionv of' an inner tube equipped with a saddlean'd a threadedattaching part for application ofmy improved tire gage thereto; Fig. 4is an'enlarged'vertical sectional View of the tire .gage showing theparts in the 'positions which they assume due to'excessive inflation orinterior pressure beyond a maximum, in 1A contra-distinction. to 1theposition I'ofithe parts shown in Fig. under normal condi- Fig. 7 is acrosssectional view taken on the line'7-7 of Fig. 4; Fig. 8 is a detailperspective view of a part of an expansion cup washer employed with thedevice.

To those acquainted with the art of pneumatictires,v the necessity forproper attent-ion to the tires in order to obtain a maximum service haslong been recognized and particularly proper infiation of a tire to the'pressure which it is constructed to withstand. For instance, nearlyevery tire that lis manufactured, depending upon its dimensions and use,is adapted to withstand a certain number of pounds pressure per squareinch when inflated in order to 'provide for the best wearing qualities,but shoulda tire which is adapted to withstand one pressure be inflatedat a lesser pressure or .ata greater p ressure, the lifev and wearingqualities of the tire are thus reduced, inasmuch as tires insufficientlyinflated will be run under an unnatural strain as dis*- tinguished fromthe position of the tire when inflated to the proper pressure, so thatthe excessive {ieXingvof the titre, especially at the side portions orbeads, will cause the same to crack or break so that if the tire shouldbe subsequently. properly or excesvsively inflated, a blow-out willalmost invariably result. Onv the vother hand, excesp sive iniationresults in improper absorption of the shocks incident to the travel overuneven road surfaces and in this case, as well as the foregoing, shocksare transmitted to the 'car and form a particular detriment to a motorand the minute parts composing the same and which require accurateadjustment for their best operation. It is therefore an objectof thepresent invention to obviate this and many other objectionable featuresincident to tire trouble and also to obviate the necessity forrefinements of con* struction and adjustment usually .found in theordinary tire gages and also to insure reliable positive operation ofthe device vunder all the eXigencies of practical everyday j rim inposition by engagement with the clencher portions d of a tire e. rlhefelly and rim are provided with alined apertures producing an opening ffor receiving the improved gage B which is attachedto `the inner tube g.This attachment is effected through the medium of a saddle 7i which isclamped to the inner tube by fastening members z' disposed inwardly andoutwardly of the inner tube `and threaded eXteriorly to an attachingstub y' Ahaving a bore opening into the tube but projecting from thetube a considerably lesser distance than the usual attaching members.

Noclaim is made'for the method of at# taching the tire to the wheel asany other improved method of attachment may be employed, but novelty isheld to reside in the use of a threaded attaching stub which projectsslightly'through. the demountable rim .and terminates'near theperipheral edge of vsaddle and threaded on to the stub so-that theattaching stub is thus securely attached in such am'anner as to preventbreaking or mutilatioriof the inner tube.

It will be observed that the attaching stub extends looselyT into theopening provided by the alined apertures in the felly and rim so as toprovide for the free passage of the gage through the opening with theparts in the position shown in Fig. lof the drawings as through theme-dium of an attaching barrel C which is interiorly threaded as shownat Z'for this purpose. has a knurled portion eXteriorly near its endattached to the stub but is exteriorly threaded there beyond' as shownat m, the wall adjacent to the knurled or unthread- -ed part beingconsiderably thicker than the the juncture of the two walls and isapertured to receive thethreaded end of a small tubel 0 which acts as acentering member to engage in the bore of the' attaching stub with theend`- of the stub contactingwith vresilient washers or the like pmounted aroundthe tire to form an air-tight joint. The exterior threadsm are employed in order to hold the barrel rigid with respect to thefelly and rim so as not to exert excessive strain upon the union betweenthe attaching stub and the inner tube, and for the opening in thefelly'from the inner face This barrel iisv this purpose av flanged nut gis engaged on the barrel so that its flange will 'enter I of\the latterwhile the wrench engaging portion of the nut will contact with the innerface of `the felly, thus preventing inward pressure against the innertube.

Attached to the barrel and extending into 152';

the same is a casing D the attachment being effected by making thelowerportion of the casing slightly smaller thanthe upper part and connectingthe parts by exterior threads .erpotherwse as. Showntat raso,that-theta@ lower end of the sleeve is provided with an enlargement t toengage an interior shoulder of the using at its upper end while theenlargement "is flanged at its lower end to engage the lower end of thecasing when the parts are connected as by a fastening member or Screw upassing through the casing and engaging the enlargement in order to holdthe sleeve stationary. rlhe upper end of the sleeve has an apertured'plug o threaded therein so as' to provide an internal shoulder adaptedto contact with a cushioning washer mounted in an annular groove in theupper face of an enlargement w of a piston m, the said piston having alongitudinal bore and carrying a pair of expansion cup washers y in itslower end to Jform an air-tight connection with the innerwall of thesleeve in which the piston isv movable, the expansive parts ofi thewasher being ot spring metal.

It will be observed that each washer has an exteriorly threadedextension which engages in a threaded recess in the enlargement of thepiston or uppermost metallic portion while the cup-shaped washers .e fitover the metallic portions to engage the threaded parts and to extendoutwardly around the peripheral faces of the metallic portion to providea uniform contacting surface to insure an air-tight contact. The pistonis thus limited in its displacement inwardly with respect to the gageand wheel but is in turn exteriorly threaded at its free end for.engagement a flanged washer carrying disk c which with its washer isthreaded on to the piston and retained thereon by a tip b having anenlarged interiorly threaded attaching portion for engagement with thethreaded` end ofthe piston. l l

Slidably mounted on thesleeve is a cylinder E which has an inwardlyextending flange c at its lower end extending upwardly and downwardly,the upwardly ex.

such spring encircling the reduced portion of the sleeve and having itslower coil attached to the enlargement of the sleeve so as to be capableof expansion and-contraction between these parts. The disk s loosely tsin the upper end of the cylinder so as to provide a surrounding spa'cefor the escape of air as will be more particularly pointed out, and saidcylinder is also provided with a plurality of openings f adjacent to itsupper end for the further escape of the air, and as shown in r 1g. 7 ofthe drawings three of suoli openings are preferably provided.

The casing D is splined longitudinally of its interior wall, as shown atg, three of suoli splines being preferably employed to receivecorresponding projections i throughout the length of an upper section Fconstituting with'the cylinder or lower section E to which it isdetachably connected.

as shown at z", a movable element which due to the engagement of theprojections with the splineslserves to prevent 'rotation of said partsindependent of the casing while still permitting longitudinal movementthereof withres'pect to the casing. The section F is provided with apartition wall j near. its bottom portion which is in turn provided witha depending flange 7J cooperating with lthe washer carried by the disk ato open or close the passage between the fla-nge and the enlargement ofthe tip which extends thereinto. The tip proper extends upwardly into avalve stem G which projects upwardly from the partition and which in itsbore carries an ordinary inflating valve H and whichis exteriorlythreadedas shown at l for the application of a valve cover .l thereto; Acoiled spring K encircles the valve stem and is received in the spacebetween the stem and the wall'of the upper sectionof the movableelement7 while the upper end of the spring engages a groove L in a plugM which is threaded into the casing and which is preferably providedv'ith spanner openings or the like to facilitate its attachment. 'Agrasping ring N is threaded or. Jthe stem an'd is exteriorly knurled topermit a tight grip to be had thereon so as to prevent the movableelement from pulling upward and eX- erting strain on the springs whilethe tire is'being inflated through'the inflating valve and gage or in"removing the inflating tube from' the stem. I

rlhe casing D is provided with a plurality o'fopenings O preferablythreev in n-umber and equi-distantly. spaced apart alternately betweenthe splines or longitudinal grooves in the inner wall of the casing7 andthe section F of the movable element adjacent to this opening isprovided with an indication mark Z', while the opposed edges of theopenings are graduated as shown at orf/.to indicate the varying degreesof pressure of the air within the tire and having indications of suchdegreeas to indicate the maximum pressure which the tire is adapted towithstand and with which the particular gage is' adapted for use.

A cap l? is provided for the to inclose the working parts and isthreaded exteriorly of the barrel as shown at Q, so as to render itreadily removable. The cap is lmurled exteriorly, as shownv at R, and isfurther provided at its closed free end S.

.to the inner wall of the cap with the apex of the cone substantially incontact with the end wall of the cap. Thev cone is provided with aplurality of openings WV near its apex lto permit the outlet of air in amanner to `be hereinafter more fully described, and the cone is sopositioned with relation to the openings T that when the closed endofthe gage is upright and positioned at the lowermost portion of a wheelwhich happens to be passing through a puddle of water, any water whichmight pass through the openings will be caused to drain therefrom andthus prevented from passing through the openings lV.

In the operation of the device the parts are normally in the positionshown in Fig. 2 of the drawings, the piston being in receded positionandthe expansive spring d operating to. compress the contractile springe which `is weaker than the aforesaid spring,

while the spring K, which coperates with the contractile spring andagainst the spring al to normally hold the piston and movable element inthe receded position, is normally expanded. In this manner ythe flange7; is held seated against the washer forming a seat in the disk a andthc-springs are made ofsuch tension or adjustment due to theadjustableconnection o-f -the parts positioned at the ends of the springs as tohold said parts seated when the tire is in- Hated to any degree ofpressure generally computed in pounds per square inch up to the maximumpressure which the particular -tire isadapted to withstand, and in thepresent instance we will suppose this pressure to be 100 pounds persquare inch. The compressed air in the tire is then free to escape.through the tube, through the bores of the piston'and tip and into thestem G, but the -inflating valve will prevent the escape of the airunless it is depressed intentionally and no escaped air can take placebetween the flange -c and its valve seat. If, however, the internalpressure ofthe tire. and within thev inner tube thereof should beexcessive, in the present instance greater than A10() pounds persquare`inch, either due to slight expansion of the air or excessiveinflation, the piston-will be moved forward to compress the spring d andsimultaneously expand the springs e" and K by pressure against theinflated valve in the stem causing a forward movement of the .movableelement constituted by the parts E and F, In this manner the spring dwill be compressed between the flange c of the section or cylinder E andthe disk a while the pis the cone and out through the openings T, all

as indicated by the arrows in Fig. 4 of the drawings. lAs the tireisinflated and the movable element is shifted dueto outward movement ofthe piston'while the'flangec is still in Contact with its seat, theindication e will coperate with the graduations m to indicate thepressure of the airand due to. the provision of a plurality-of'suchindicationmarks, the pressure ca n be inspected very readilyby movingthe cap without the necessity of getting under the automobile or in anyinconvenient place depending upon the body to which the gageis applied.

From the foregoing description in connection with the accompanyingdrawings it will be seen that a maximum pressure safety inflating tiregage has been provided which does away with the nuisance` of having toremove the pump Aconnection in order to know the exact air pressurewithin the tire, i

prevents the inner tube from shifting or creeping by reason of theparticular attachment specified, permits a tire' to be properly inflatedin the dark without having to strike matches, flash a light or carry thegage to the headlight, and provides a device which will work accuratelyat any angle. of the' wheel .from three positions. .Furthermore, a gageconstructed as specified with a capas described prevents dust, oil, dirtand other foreign matter injurious t0 rubber from entering the innertube or interfering with the operation of the working parts, and bysoldering the plug M position access to the working parts is pre- 120vented and the device is thus rendered foolproof, and vat the same timethe device is not affected by sudden road jars or shocks due to thetravel of the vehicle over uneven road surfaces.'

Having thus described my invention, whati I claim as new and desire tosecure by Letters Patent is 1. 'The combination with a bodyto beinflated and to withstand avpredetermined de gree of pressure; of a gageattached there-- exceeds the maximum, said means including inpart apiston actuated valve normally held in closed position by the internalpressure of the tire and automatically opened upon the existence, ofexcessive pressure in the tire to permit the escape of air until theproper pressure has been reached.

2. rlhe combination with a body to be iniated and to withstand apredetermined degrec of pressure; of a gage attached thereto andincluding an inflating valve permitting inflation of the body throughthe gage, means to indicate the internalv pressure of said body, andmeans to relieve the body of excess pressure beyond the maximum, saidmeans forming ,a part of the gage and including a balanced valvenormally held in closed. position whereby the escape of air from thebody is prevented but adapted to be shifted by pressure above theVpredetermined point and including an apertured shell for the escape ofthe air.

3. |The combination with a tire gage including a casing having anattaching barrel and a cap threaded to the barrel; of a tire having anattaching portion adapted to extend through the felly of'a wheelslightly beyond the peripheral edge of the felly and loosely fittedtherein for attachment of the barrel with a surrounding space, and anattaching member threaded to the barrel and filling the space betweenthe barrel and the surrounding wall of the aperture in the felly to holdthe gage rigid.

4. In a maximum pressure safety infiating gage, the combination with abody adapted to be inflated and having an attaching part; of a barrelfor connection with said part, a casing within the barrel, a pair ofmovable elements mounted within the casing, means permitting inflationof the body through the elements,v and means vcoperative with saidmovable elements to indicate the pressure within the body, said elementspreventing escape of air from the body below a predetermined pressurewhile permitting the escape of the air under excessive pressure.

5. In a maximum pressure safety inflating gage, the combination with abody ad-apted vto be inflated and having an attaching part;

until the inflation thereof beyond a maximum pressure preventing theescape of air, and means coperative with said movable elements to causesaid elements to disengage to permit theescape of air upon thepressurereaching a .point beyond the maximum due to expansion, excessiveinfiation or otherwise and one of said movable elements coperating withthe graduation to indi- Vcate the internal pressure.

6. In a maximum pressure safety inflating gage, the combination with abody adapted to be iniated and having an attaching part; of a barrel forconnection with said part, a casing within the barrel, a pair of movableelements mounted within the casing, means permitting inflation of thebody through the elements, one of said elements and the casing havingopenings therethrough, said casing being graduated adjacent to theopenings therein, and said elements when the tireis being inflated anduntil the inflation thereof beyond a maximum pressure preventing theescape of air, spring means between the casing and the movable elementsand between the movable elements whereby pressure in the bodybelow amaximum will not cause the escape of air while pressure above themaximum will result in movement of the parts against the action of thespring means to permit the escape of air through the openings, anda cap,engaged on the barrel over the casing and parts carried by the barrel.

7. ln a maximum pressure safety inflating gage, the combination with abody adapted to be infiated and having an attaching part; of a barrelfor connection with said part, a casing within the barrel, a pair ofmovable elements mounted within the casing, means permitting inflationof the body through the elements, one of said elements and the casinghaving openings therethrough, said casing being graduated adjacent tothe openings therein, and said -elements when the i'io tire is beinginflated and until the infiation thereof beyond a maximum pressurepreventing the escape of air, spring means between the casing, ;:and themovable elements and between the imovable elements whereby pressure inthe body below a maximum will not cause the escape of air while pressureabove the maximum will result in move- ,ment of the parts against theaction of the spring means to permit the escape of air through theopenings, said openias prevent the entranceof foreign matter thereinto.

l8. In a maximum pressure safety inflating tire gage, the combinationwith a tire to be inflated having an attaching stub; of a barrelthreaded to the stub, a cap over the barrel, a casing rigidly fixed inthe barrel, "a sleeve held in the casing, a piston movable in the sleeveand having albore therethrough having communication with the interior ofthe tire, a movable element sldable longitudinally in the casingl andincluding an in- Hating valvethrough which the tire may be inflated uponthe removal of the cap, and spring vmeans preventing outward movement ofthe movable element below a maximum pressure which the tire is adaptedto l sleeveheld in the casing, a piston movable in the sleeve and havinga bore therethrough having communication with the interior of the tire,a movable element slidable longitudinally in ,the casing and includingan ilnflating valve. through which the tire may be inflated ,upon theremoval of the cap, said 'pistonand movablelelement coperating to form.a continuous passage through the 'piston and infiating valve tonormally prevent'the escape of air between the valve and the tire, saidparts including the movable element causing the cap having openings topermit the escape of air by separation of the piston and movable elementunder pressure beyond the maximum, and means to adjust the tension ofsaidv parts and the degree of action thereof under the air pressure.

l0. In a maximum pressure safety inflating Atire gage, the combinationwith a tire to be` iniated having an attaching stub; of a barrelthreaded to the Stub, a cap over the barrel, a casing rigidly fixed inthe barrel, a sleeve vheld in the casing, a piston movable in thesleeveand having a bore therethrough having communication with-'theinterior of the ire, a movable elementv slidable longitudi ally in the'casingand including an inatin valve through which the tire may beinflated upon the removal of thecap, spring means preventing outwardmovement of the rmovable element below a maximumy pressure which the-tire is adapted to withstand but adapted to permit the escape of air byseparation of the parts when the pressure in the tirehas exceeded themaximum whereby over-inflation lof the ltireis obviated, and agrasping-member carried by the inllating valve to prevent strain on themovable elethe interior of said body, an element longitudinally movablein the casing but held against rotation, said movable element comprisingtwo sections connected to move-simultaneously, a piston having anenlargement, a sleeve carried by the casing and movably receiving thepiston Athrough the medium of its enlargement, said piston being limitedin its movement forwardly under the action of the air pressure` andcooperating with one of said sections to prevent the escape of air fromthe body, and spring means contained in the casing and coperating withthe piston and movable element to cause said parts to remain in saidpositions at and below a maximum pressure and permitting the same toseparate to permit` the escape of air beyond a maximum pressure.

l2. In a maximum pressure safety inflating gage adapted for applicationto .a body containing air under pressure, an attachingmember, a casingmounted in said member and extending in'contact with an inner wallthereof, a tube in the bottom portion of said attaching member forcommunication with the interior of said body, an element longitudinallymovable in the casing but held against rotation, said movable elementcomprising two sections connected to move simultaneously, a pistonhaving an enlargement, a sleeve carried bythe casing and movablyreceiving the piston through the medium of its enlargement, said pistonbe ing-limited in its movement forwardly under the action of the airpressure and coperating with one of said sections to prevent the vescapeof air from the body, spring mea-ns contained in the casing andcoperating with the piston and movable element to caus'e said parts toremain in said positions at and below a maximum pressure and permittingthe same to separate to permit the escape of air beyond a maximumpressure, said casing and one section of the movable element havingopenings'therein, the'movable element havin an indication andfthe pistonhaving grauatioris adjacent to the opening with which the indica-tioncoperates to indicate the internal pressure upl to a maximum, and 'a capattached to theattalehing part to inclose the casing and other parts.

13. In a maximum pressuresafety inflating gage adapted for application.to avbody,

containing air under pressure, an attaching member, a casing mounted insaid member and extending in contact with an inner wall thereof, a tubein the bottom portion of said attaching member1 for communication withthe interior of said body, an element longitudinally movable in thecasing but held against rotation, said movable element and casing havingopenings therein, the openings of the casing bearing graduations alongtheir edges and the movable element having indications cooperating withthe graduations to indicate the internal pressure of the body, a sleevehaving an enlargement fixed to the casing and having a reduced portionextending into the casing, a" piston movable in the sleeve and limitedin its movement forwardly, packing means between the piston and thesurrounding wall of the sleeve, spring means between the movable elementand the enlargement ofthe sleeve, spring means between the movableelement and the top of the casing, said spring means causing thecoperation ofthe movable element and the piston to prevent the escape ofair through the passage thus produced, an in- Hating valve at the end ofthe passage permitting the iniiating of the body for preventing theescape of the air under pressure, and spring means between the pistonand movable element acting against the first mentioned spring means andcompressed while the `other spring means are expanded to permit movementof the piston and movable element to disengage the same from each otherand permit the escape of air .when

the same has reached a predetermined pressure.

- la. ln a maximum pressure safety inflating gage adapted forapplication to a body containing air under pressure, an attachingmember, a casing mounted in said member casing having openings therein,the openings of the casing bearing graduations along theirvedges and themovable element hav-v ing indications cooperating with the graduationsto indicate the longitudinal pressure of the body, a sleeve having anenlargement fixed to the casing and having a reduced portion extendinginto the casing, a piston movable in the 'sleeve and limited in itsmovement forwardly, means to cushion the movement of the piston at itsforward limit, packing means between the piston and the surrounding wallof the sleeve, spring means between the movable element and theenlargement of the sleeve, spring means between thel movable element andthe top of thecasing, said spring means causing the cooperation of themovable element and the piston to prevent the escape of air through thepassage thus produced, an inflating valve at the end of the passagepermitting the iniating ofthe body for preventing the escape of theairunder pressure, spring ymeans between the piston and movable clementacting against the first mentioned spring means and compressed while theother spring means are expanded to permit movement of the piston andmovable element to disengage the same from each other and permit theescape of air when the same has reacheda predetermined pressure, meansfor adjusting the tension of said spring means, a grasping member on theinating valve. carrying member, a covering for said member, and a capover said parts. v v

15. A maximum pressure safety inflating tire gage, comprising a barrelinteriorly threaded to engage an attaching stem of an inner tube, saidbarrel being exteriorly threaded, a securing nut threaded on Ythebarrel, a cap also threaded on the barrel, a partition in the barrelforming upper and lower hollowed-out portions, packing means in thelower hollowed-out portion to form an air-tight connection with theattaching stem, a casing xed in the barrel and depending into the same,a sleeve extending partially into the casing and having an en-'largement fitting in the lower end of the casing and limited in itsmovement therein, means for securing the sleeve against movement in thecasing, a packing washer between the enlargement and the end wall of theother hollowed-out portion of the casing, a stop member in the upper endof the sleeve restricting the bore thereof, 'a piston having a reducedportion passing through the stop member and having an enlargementmovable in the sleeve, the' piston having a bore therethrough,expansible ,cup washers carried by y the enlargement to form anair-tight connection with the interior wall of the sleeve,

cushioning means carried by the enlargement to engage the stop member, acylinder slidably engaged with the sleeve exteriorly, Y

a tubular section threaded `to the cylinder and splined to the innerwall of the casing,A

a partition in the tubular section terminating in a depending flange andan upwardly extending infiating stem, an inflating valve in the stem,all of said parts being inclosed in the cap, a disk carried bythe-piston and having a seat, a tip'also carried by the piston andextending up into the inflating stem, a contractile spring connected tothe cylinder and. the enlargement and encircling the sleeve, anexpansibfle spring between the partition of the tubular section and thefree end of the casing coperating with the contractile spring to holdthe flange in engagement with the seat of the disk whereby the escape ofair under pressure is prevented,

there being a continuous passage communicating with the tube to permitinlating of the latter through the iniiatin'g valve, and a springbetween the disk and cylinder adapted to be compressed. upon thepressure in the tube exceeding a maximum whereby the iiange willdisengage from the seat to .permit the escape of air preventingexcessive inlatiiig ofjtlie tube, said cylinder, casing and cap havingopenings through which said airescapes and the tubular sectioncoperating withthe casing to indicatethe internal pressurezof the tube.

'16. The vcombination with a tire having an inner tube adapted to beiniated; of a threaded attaching stub c lainped to the tube andprojecting slightly fromvthe tire, a rim to which the tire is attached,a felly on which said rim is mounted, said rim and elly havingalinedapertures into which the attaching stub slightly projects with asurrounding space therebetween, and a gage forrelieving the tire ofexcessive presy sure, said gage vhaving an attaching barrel extendingloosely through the apertures and being connected to the stub near'theouter edge of thefelly, said barrel having an exteriorly threaded partand a nut threaded thereon withv afiiange extending snugly into 30thef-aperture of the felly whereby the gage is held against movement andundue strain" on theattaching stub and inner tube prevented.;

17. The combination with a'- tire having anlinner tube adaptedvto beiniriatedgof a threaded attaching stub clamped to thetube and projectingslightly from the tire, ai rim to which the tire is attached, a ellyonwhich said rim is mounted, said rim and felly having alined aperturesinto which the' attaching stub projects through the rim and into theelly, a gage forrelieving the tire'of excessive pressure, said gage'having an attaching barrel extending through the apertures of the fellyand rim with a space .between it andthe walls of the apertures andbeingconnected to the stub near the-peripheral edge of the telly, saidbarrel 'hav-..

ing an exteriorly threaded part and a nut threaded thereon with a flangeextending into the apertures of the-felly andwith its engaging partoutwardly of the-aperture whereby the .gage is held against movement andundue strain on the attaching stub and inner tube prevented, and a capthreaded on Athe barrel to contact with the nutand inclose the workingparts of the gage.V

i 18. A maximum pressure safetyfinating sure to relieve the same, andmeans to in-v dicate the internal pressure of the tire at all times,said vmeans including a 'part carried by thevalve and a casing held frommovement outwardly of said part and having a plurality of elongatedopenings therethrough, said casing being graduated adjacent to saidopenings and the last named stationary partbeing provided withindications coperating with said graduations whereby vthe pressure -inthe tire at and below a maximum may be determined.

19. A maximum pressure safety inflating tire gage, comprising mechanismto relieve a tire or similar body of excessive internal.

air pressure but. adapted to permit the iniiation of the tiretherethrough, said mechanism, including an inlating valve held in` abalanced position, means moyable -independently of vthe valve anddisposed in-l .wardly thereof to normally prevent the escape of airbelow said excessive pressure but actuated upon the existence ofexcessive pressure to relieve the same, means to indicate the internalpressure of the tire at all times, said means including a part. carriedby the valve and a casing heldfrom movement outwardly of said part andhaving' a' plurality of elongated openings therethrough, said casingbeing graduated adjacentA to said openings and the last named stationarypart being provided withindications cooperating with said graduationswhereby the pressure in the tire at and below Aa maximum may bedetermined, and means carried by said casing and coperating with thevalve and part carried thereby to regulate theexisting balance wherebylthe device may be set to withstand any desired pressure and to relievepressure excessive ther to.`

In testimony whereof I have signed my name to this specication in thepresence of two subscribing witnesses.

SEAMAN PARTERSUS NOE.

Witnesses: i

SAMUEL B. Non,V JOHN E. BURGH.

